Determination of bias in sampling systems

Lyman G.J. (1993) Determination of bias in sampling systems. Minerals Engineering, 6 1: 99-105. doi:10.1016/0892-6875(93)90167-L

Author Lyman G.J.
Title Determination of bias in sampling systems
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1016/0892-6875(93)90167-L
Open Access Status Not yet assessed
Volume 6
Issue 1
Start page 99
End page 105
Total pages 7
Subject 1900 Earth and Planetary Sciences
1906 Geochemistry and Petrology
1909 Geotechnical Engineering and Engineering Geology
Abstract In the past twenty years, the sampling Standards documents of a number of countries have been revised more than once. Each of the Standards, particularly those concerned with coal and coke sampling, have made minor alterations to the recommended procedures for estimation of bias in a sampling system or procedure. None of the procedures correctly take into account the fact that assay results from both the reference method and the procedure to be tested must be considered as random variables if the statistical analysis is to be correct. Most Standards rely upon a statistical analysis of paired differences to detect bias. This paper presents a procedure for bias test result analysis that accounts for random variation in reference method and test method assays and demonstrates, using some coal bias test data, that the method of analysis of paried differences can fail to detect serious bias of scale.
Keyword Bias
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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